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# STATISTICAL INVESTIGATION

STATISTICAL INVESTIGATION. Meaning and Definition Investigation or Inquiry means a search for truth, knowledge or information. Statistical investigation means statistical survey.

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## STATISTICAL INVESTIGATION

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1. STATISTICAL INVESTIGATION Meaning and Definition Investigation or Inquiry means a search for truth, knowledge or information. Statistical investigation means statistical survey. Scientific and systematic collection of data and their analysis with the help of various statistical methods and their interpretation so as to throw light on some problem to fulfill a certain purpose after making a suitable plan is known as statistical investigation.

2. Cont…… The person who carries the statistical investigation is known as investigator. The person from whom the information is obtained is known as respondent.

3. UTILITY OF STATISTICAL INVESTIGATION • The statistical investigation means some sort of investigation by an individual or agency wherein the relevant information is obtained in quantitative terms. Thus, the foundation of statistical investigation lies on data. Hence, the utility or importance of statistical investigation is same as that of statistics or statistical data.

4. TYPES (OR NATURE ) OF STATISTICALINVESTIGATION • Complete or census investigation • Confidential or open investigation • Direct or indirect investigation • Original or repetitive investigation • General or special purpose investigation • Postal or personal investigation • Official, semi-official or non-official investigation

5. PLANNING OF STATISTICAL INVESTIGATION • Definition of problem • Purpose or object of investigation • Field of the investigation • Time or period and budget of investigation • Sources of information • Types of investigation • Statistical units – income, wages, year, educated person, accidents • Selection of suitable methods of collection of data • Organization of investigation • Analysis and presentation of data

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